CN103528890A - Stretching and unloading testing device - Google Patents
Stretching and unloading testing device Download PDFInfo
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- CN103528890A CN103528890A CN201310552574.5A CN201310552574A CN103528890A CN 103528890 A CN103528890 A CN 103528890A CN 201310552574 A CN201310552574 A CN 201310552574A CN 103528890 A CN103528890 A CN 103528890A
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Abstract
The invention relates to a stretching and unloading testing device. The stretching and unloading testing device comprises a first installation mechanism, a second installation mechanism, a loading piece and a stop block, wherein the first installation mechanism is used for installing one end portion of a test specimen, the second installation mechanism is used for installing the other end portion of the test specimen, one end portion of the loading piece is fixedly connected with the second installation mechanism, and the stop block is fixedly connected with the first installation mechanism and connected with the second installation mechanism in a sliding mode; a groove is formed in the stop block in the length direction of the stop block; the second installation mechanism is located in the groove and slides along the groove; the other end portion of the loading piece penetrates out of the stop block and is arranged in a sliding mode relative to the stop block; the central plane of the first installation mechanism in the width direction, the central plane of the second installation mechanism in the width direction, the central plane of the stop block in the width direction and the central plane of the loading piece in the width direction are located on the same plane. The stretching and unloading testing device can realize continuous loading and unloading for tensile tests at a medium / high strain rate.
Description
Technical field
The present invention relates generally to a kind of stretching unloading test device, belongs to material mechanical performance test and representational field, for industries such as automobile, aviations.
Background technology
In the mechanical test of the vehicle materials such as high-strength steel, macromolecular material, plastics, often need the uninstall feature of test material.At present, for the test of material uninstall feature, normally by motor, realizing closed-loop control, can realize on the electronic universal tester that adds continuously unloading and completing.But electronic universal tester can only be realized the test under quasistatic or lower rate of strain.In reality, for vehicle materials such as high-strength steel, macromolecular material, plastics, what we more needed concern is the mechanical characteristic of material under middle and high rate of strain loads.And for the middle and high fast cupping machine that can realize middle and high rate of strain loading, be generally hydraulic system, by open loop, control and carry out unidirectional loading, be difficult to realization and add continuously unloading.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, can realize the stretching unloading test device that adds continuously unloading under middle and high rate of strain.
For solving above technical matters, the present invention adopts following technical scheme:
A kind of stretching unloading test device, comprise the first installing mechanism for an end of installation testing test specimen, for second installing mechanism of the other end of described test specimen is installed, the loaded member that one end is fixedly connected with described the second installing mechanism, the limited block that is fixedly connected with described the first installing mechanism and is slidably connected with described the second installing mechanism, described limited block offers groove along its length, described the second installing mechanism is positioned at described groove and slides along described groove, the other end of described loaded member passes described limited block and arranges slidably with described limited block, described the first installing mechanism is at the central plane of Width, described the second installing mechanism is at the central plane of Width, described limited block is the equal isoplanar of central plane at Width in the central plane of Width and described loaded member.
Described the first installing mechanism comprises the first installation portion, described the first installation portion offers along its length for placing the first mounting groove of an end of described test specimen, in an end of described the first installation portion and be positioned on the center line of described the first installation portion Width and offer the first breach, described the first breach is communicated with described the first mounting groove, the width of described the first breach is less than the width of described the first mounting groove, described the first installing mechanism also comprises the first cover plate that is arranged on described the first mounting groove top, described the first cover plate is close to the surface of described the first installation portion and is fixedly connected with described the first installation portion by a plurality of the first securing members.
One end of described the first installation portion is fixedly connected with described limited block, two sides in an end of described the first installation portion are arranged with joint pin, described limited block is offering connecting hole with the corresponding position of described joint pin, described joint pin has external thread, described joint pin is provided with nut, and described joint pin is connected described the first installation portion with described nut through described connecting hole successively with described limited block.
On the symmetrical two side faces of described limited block, offer threaded hole, described threaded hole is communicated with described connecting hole, is provided with the bolt for described limited block is fixedly connected with described joint pin in described threaded hole.
Length direction along described limited block on described two side faces offers a plurality of threaded holes, and described in each, threaded hole correspondence is provided with a bolt.
Described the first installing mechanism also comprises between an end that is arranged on described the first cover plate and described test specimen for eliminating an end of described test specimen and first pad in the gap between described the first cover plate, being arranged on described the first mounting groove bottom for adjusting an end of described test specimen at the second pad of described the first mounting groove short transverse position.
Described the second installing mechanism comprises the second installation portion, described the second installation portion offers along its length for placing second mounting groove of the other end of described test specimen, in an end of described the second installation portion and be positioned on the center line of described the second installation portion Width and offer the second breach, described the second breach is communicated with described the second mounting groove, the width of described the second breach is less than the width of described the second mounting groove, described the second installing mechanism also comprises the second cover plate that is arranged on described the second mounting groove top, described the second cover plate is close to the surface of described the second installation portion and is fixedly connected with described the second installation portion by a plurality of the second securing members.
Described the second installation portion is fixedly connected with described loaded member, one end portion of described loaded member is positioned at described the second mounting groove, in the other end of described the second installation portion and be positioned on the center line of described the second installation portion Width and offer the 3rd breach, described the 3rd breach is communicated with described two mounting grooves, the width of described the 3rd breach is less than the width of described the second mounting groove, and described the second installation portion is stretched out from described the 3rd breach in the other end of described loaded member.
Described the second installing mechanism also comprises and being arranged between described the second cover plate and the other end of described test specimen for eliminating the other end of described test specimen and the 3rd pad in the gap between described the second cover plate, being arranged on described the second mounting groove bottom for adjusting the other end of described test specimen at the 4th pad of described the second mounting groove short transverse position.
Symmetrical two side faces on the position not being connected with described the second installing mechanism of described loaded member offers the 4th breach.
Due to the enforcement of technique scheme, the present invention compared with prior art tool has the following advantages:
Stretching unloading test device of the present invention not only can be realized the discharge mechanism of controlled displacement for different materials for test by the link position of limited block and the first installing mechanism is set, also can remove limited block, is reduced to simple power and controls discharge mechanism.
What stretching unloading test device of the present invention had been realized tension test under middle and high rate of strain adds unloading continuously.
The present invention stretches, and unloading test apparatus structure is simple, easy to operate, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is the stretch front elevational schematic of unloading test device of the present invention;
Fig. 2 be in Fig. 1 A-A to cross-sectional schematic;
Fig. 3 is that schematic diagram is looked on the stretch left side of unloading test device of the present invention;
Fig. 4 be the present invention stretch unloading test device wait axle schematic side view (not showing test specimen and cover plate);
In figure: 1, the first installation portion; 2, the first cover plate; 3, the first securing member; 4, the first breach; 5, the first mounting groove; 6, joint pin; 7, test specimen; 8, the second installation portion; 9, the second breach; 10, the second mounting groove; 11, the second cover plate; 12, the second securing member; 13, the 3rd breach; 14, limited block; 15, groove; 16, nut; 17, bolt; 18, loaded member; 19, the 4th breach; 20, the first pad; 21, the second pad; 22, the 3rd pad; 23, the 4th pad; 24, lug boss.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.
As shown in accompanying drawing 1 ~ 4, a kind of stretching unloading test device, comprise the first installing mechanism for an end of installation testing test specimen 7, for second installing mechanism of the other end of test specimen 7 is installed, the loaded member 18 that one end is fixedly connected with the second installing mechanism, the limited block 14 that is fixedly connected with the first installing mechanism and is slidably connected with the second installing mechanism, limited block 14 offers groove 15 along its length, the second installing mechanism is positioned at groove 15 and slides along groove 15, the other end of loaded member 18 passes limited block 14 and arranges slidably with limited block 14, the first installing mechanism is at the central plane of Width, the second installing mechanism is at the central plane of Width, limited block 14 is the equal isoplanar of central plane at Width in the central plane of Width and loaded member 18.Groove 15 is connected with the external world of limited block 14 near one end of the first installing mechanism, and the other end of groove 15 has limiting section, offers through hole on limiting section, and limited block 14 is stretched out from this through hole in the other end of loaded member 18.
In the present embodiment, the first installing mechanism comprises the first installation portion 1, the first installation portion 1 offers along its length for placing the first mounting groove 5 of an end of test specimen 7, in an end of the first installation portion 1 and be positioned at the width that the width that offers the first breach 4, the first breach 4 on the center line of the first installation portion 1 Width is less than the first mounting groove 5.The part of test specimen 7 is stretched out the first installation portion 1 from the first breach 4.The first installing mechanism also comprises that the first cover plate 2, the first cover plates 2 that are arranged on the first mounting groove 5 tops are close to the surface of the first installation portion 1 and are fixedly connected with the first installation portion 1 by a plurality of the first securing members 3.
While specifically arranging, one end of the first installation portion 1 is fixedly connected with limited block 14, two sides in an end of the first installation portion 1 are arranged with joint pin 6, limited block 14 offers connecting hole in the position corresponding with joint pin 6, joint pin 6 has external thread, joint pin 6 is provided with nut 16, and joint pin 6 is connected the first installation portion 1 with nut 16 through connecting hole successively with limited block 14.For make between limited block 14 and the first installation portion 1 be connected more stable, at limited block 14 symmetrical two side faces along its length, offer threaded hole, threaded hole is communicated with connecting hole, is provided with the bolt 17 for limited block 14 is fixedly connected with joint pin 6 in threaded hole.Length direction along limited block 14 on two side faces offers a plurality of threaded holes, and each threaded hole correspondence is provided with a bolt.Particularly, each side is provided with 3 threaded holes.For this stretching unloading test device is more convenient for using, on the other end of the first installation portion 1, be provided with the lug boss 24 extending along the first installation portion 1 length direction, better, the width of the width of lug boss 24 and thickness and loaded member 18 and consistency of thickness, and be positioned on the extended line of loaded member 18 length directions.
The first installing mechanism also comprises and being arranged between the first cover plate 2 and an end of test specimen 7 for eliminating an end of test specimen 7 and first pad 20 in the gap between the first cover plate 2, being arranged on the first mounting groove 5 bottoms for adjusting an end of test specimen 7 at the second pad 21 of the first mounting groove 5 short transverse positions.
In the present embodiment, the second installing mechanism comprises the second installation portion 8, the second installation portion 8 offers along its length for placing second mounting groove 10 of the other end of test specimen 7, in an end of the second installation portion 8 and be positioned on the center line of the second installation portion 8 Widths and offer the second breach 9, the second breach 9 is communicated with the second mounting groove 10, and the width of the second breach 9 is less than the width of the second mounting groove 10.The part of test specimen 7 is stretched out the second installation portion 8 from the second breach 9.The second installing mechanism also comprises that the second cover plate 11, the second cover plates 11 that are arranged on the second mounting groove 10 tops are close to the surface of the second installation portion 8 and are fixedly connected with the second installation portion 8 by a plurality of the second securing members 12.
While specifically arranging, the second installation portion 8 is fixedly connected with loaded member 18, one end portion of loaded member 18 is positioned at the second mounting groove 10, in the other end of the second installation portion 8 and be positioned on the center line of the second installation portion 8 Widths and offer the 3rd breach 13, the 3rd breach 13 is communicated with the second mounting groove 10, the width of the 3rd breach 13 is less than the width of the second mounting groove 10, and the second installation portion 8 is stretched out from the 3rd breach 13 in the other end of loaded member 18.
The second installing mechanism also comprises and being arranged between the second cover plate 11 and test specimen 7 for eliminating the other end of test specimen 7 and the 3rd pad 22 in the gap between the second cover plate 11, being arranged on the second mounting groove 10 bottoms for adjusting the other end of test specimen 7 at the 4th pad 23 of the second mounting groove 10 short transverse positions.
In the present embodiment, on the symmetrical two side faces at the position not being connected with the second installing mechanism of loaded member 18, offer the 4th breach 19.Particularly, the 4th breach 19 symmetries offer 2.
In the present embodiment, groove 15, the first mounting groove 5 and the second mounting groove 10 threes' notch homonymy.
When the present invention specifically uses, process the thickness of test specimen 7 and the thickness stack pile of loaded member 18, select the first pad 20, the second pad 21, the 3rd pad 22 and the 4th pad 23, first an end of the first pad 20, test specimen 7 and the second pad 21 are put into the first mounting groove 5 successively, the center section of test specimen 7 stretches out the first installation portion 1 from the first breach 4, then the first cover plate 2 is locked by the first securing member 3 and the first installation portion 1.Then an end of the other end of the 3rd pad 22, test specimen 7, loaded member 18 and the 4th pad 23 are put into the second mounting groove 10 successively, and by the other end alignment of an end of loaded member 18 and test specimen 7, then the second cover plate 11 is locked by the second securing member 12 and the second installation portion 8.Then joint pin 6 is passed to connecting hole, allow the second installation portion 8 slip in groove 15 and to allow the other end of loaded member 18 stretch out limited block 14 from the through hole of limited block 14 upper limit portions.Then regulate the link position of limited block 14 and joint pin 6, screw on nut 16 and bolt 17 limited block 14 is fixing.In installation process, the central plane of loaded member 18 thickness directions need with the central plane coplanar of test specimen 7 thickness directions.
While measuring the unloading of test specimen 7, stretching discharge mechanism of the present invention is installed on testing machine and is tested, particularly, lug boss 24 is fixed in tester base, the other end of loaded member 18 is fixed on the loading chuck of testing machine.When loaded member 18 is subject to loading, will transmit loading force to test specimen 7 by the second installation portion 8, realize and loading.When the first installation portion 8 rises to given displacement, due to the restriction of limited block 14, the second installation portion 8 stops rising, and test specimen 7 keeps former stress.On the other hand, along with the further increase of loading force, will there is fracture at the 4th breach 19 places in loaded member 18, thereby realize the unloading to test specimen 7.
The loaded member 18 of stretching unloading test device of the present invention can be by adopting the 4th different breach 19 sizes to control unloading force, and the size of the 4th breach 19 can be obtained the pulling strengrth of this material under different breach sizes by the tension test of a certain amount of breach size and determines.
Stretching unloading test device of the present invention can be that unloading is controlled in displacement, by limited block 14, the link position on joint pin 6 is controlled the sliding distance of the second installation portion 8, while making test specimen 7 be stretched to certain displacement, test specimen 7 is no longer stretched, and loaded member 18 is proceeded to stretch, last loaded member 18 fractures realize unloading; Also can be that power is controlled unloading, remove limited block 14, near the size of the 4th breach 19 in loaded member 18, control the size of unloading force.
Above the present invention is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; and the invention is not restricted to the embodiments described; the equivalence that all Spirit Essences according to the present invention are done changes or modifies, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. a stretching unloading test device, it is characterized in that, comprise the first installing mechanism for an end of installation testing test specimen, for second installing mechanism of the other end of described test specimen is installed, the loaded member that one end is fixedly connected with described the second installing mechanism, the limited block that is fixedly connected with described the first installing mechanism and is slidably connected with described the second installing mechanism, described limited block offers groove along its length, described the second installing mechanism is positioned at described groove and slides along described groove, the other end of described loaded member passes described limited block and arranges slidably with described limited block, described the first installing mechanism is at the central plane of Width, described the second installing mechanism is at the central plane of Width, described limited block is the equal isoplanar of central plane at Width in the central plane of Width and described loaded member.
2. stretching unloading test device according to claim 1, it is characterized in that, described the first installing mechanism comprises the first installation portion, described the first installation portion offers along its length for placing the first mounting groove of an end of described test specimen, in an end of described the first installation portion and be positioned on the center line of described the first installation portion Width and offer the first breach, described the first breach is communicated with described the first mounting groove, the width of described the first breach is less than the width of described the first mounting groove, described the first installing mechanism also comprises the first cover plate that is arranged on described the first mounting groove top, described the first cover plate is close to the surface of described the first installation portion and is fixedly connected with described the first installation portion by a plurality of the first securing members.
3. stretching unloading test device according to claim 2, it is characterized in that, one end of described the first installation portion is fixedly connected with described limited block, two sides in an end of described the first installation portion are arranged with joint pin, described limited block is offering connecting hole with the corresponding position of described joint pin, described joint pin has external thread, described joint pin is provided with nut, and described joint pin is connected described the first installation portion with described nut through described connecting hole successively with described limited block.
4. stretching unloading test device according to claim 3, it is characterized in that, on the symmetrical two side faces of described limited block, offer threaded hole, described threaded hole is communicated with described connecting hole, is provided with the bolt for described limited block is fixedly connected with described joint pin in described threaded hole.
5. stretching unloading test device according to claim 4, is characterized in that, the length direction along described limited block on described two side faces offers a plurality of threaded holes, and described in each, threaded hole correspondence is provided with a bolt.
6. stretching unloading test device according to claim 2, it is characterized in that, described the first installing mechanism also comprises between an end that is arranged on described the first cover plate and described test specimen for eliminating an end of described test specimen and first pad in the gap between described the first cover plate, being arranged on described the first mounting groove bottom for adjusting an end of described test specimen at the second pad of described the first mounting groove short transverse position.
7. unloading test device according to claim 1, it is characterized in that, described the second installing mechanism comprises the second installation portion, described the second installation portion offers along its length for placing second mounting groove of the other end of described test specimen, in an end of described the second installation portion and be positioned on the center line of described the second installation portion Width and offer the second breach, described the second breach is communicated with described the second mounting groove, the width of described the second breach is less than the width of described the second mounting groove, described the second installing mechanism also comprises the second cover plate that is arranged on described the second mounting groove top, described the second cover plate is close to the surface of described the second installation portion and is fixedly connected with described the second installation portion by a plurality of the second securing members.
8. stretching unloading test device according to claim 7, it is characterized in that, described the second installation portion is fixedly connected with described loaded member, one end portion of described loaded member is positioned at described the second mounting groove, in the other end of described the second installation portion and be positioned on the center line of described the second installation portion Width and offer the 3rd breach, described the 3rd breach is communicated with described two mounting grooves, the width of described the 3rd breach is less than the width of described the second mounting groove, and described the second installation portion is stretched out from described the 3rd breach in the other end of described loaded member.
9. stretching unloading test device according to claim 7, it is characterized in that, described the second installing mechanism also comprises and being arranged between described the second cover plate and the other end of described test specimen for eliminating the other end of described test specimen and the 3rd pad in the gap between described the second cover plate, being arranged on described the second mounting groove bottom for adjusting the other end of described test specimen at the 4th pad of described the second mounting groove short transverse position.
10. stretching unloading test device according to claim 1, is characterized in that, the symmetrical two side faces on the position not being connected with described the second installing mechanism of described loaded member offers the 4th breach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552574.5A CN103528890B (en) | 2013-11-08 | 2013-11-08 | A kind of three-point bending beam test unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552574.5A CN103528890B (en) | 2013-11-08 | 2013-11-08 | A kind of three-point bending beam test unit |
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| Publication Number | Publication Date |
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| CN103528890A true CN103528890A (en) | 2014-01-22 |
| CN103528890B CN103528890B (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310552574.5A Active CN103528890B (en) | 2013-11-08 | 2013-11-08 | A kind of three-point bending beam test unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237015A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression testing device |
| CN104237016A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression testing device |
| CN104237014A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression test device |
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| CN203551387U (en) * | 2013-11-08 | 2014-04-16 | 清华大学苏州汽车研究院（相城） | Stretching-unloading testing device |
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| CN2767993Y (en) * | 2004-12-28 | 2006-03-29 | 西北有色金属研究院 | Clamp for testing high temperature tensile property of thin-walled pipe |
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| CN104237015A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression testing device |
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| CN104237014A (en) * | 2014-10-17 | 2014-12-24 | 清华大学苏州汽车研究院 | High-speed dynamic compression test device |
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| CN103528890B (en) | 2015-10-21 |
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